RequirementsWizard invoke method error

I am learning to use the Android-Proximity-SDK and am trying to get location permissions using the RequirementsWizardFactory class. I have added the sample code from this documentation directly before I call proximityObserver.startObserving(venueZone).

The problem is that in the invoke() method, the line

proximityObserver.addProximityZone(venueZone).start()

throws the error: "Cannot resolve method ‘addProximityZone(…)’.

I’m not sure why this would be the case, I’ve simply followed along with the provided example code to implement the Proximity SDK.

Figured it out. The SDK documentation on Github is out of date. Needed to follow these instructions.